IF YOU ENCOUNTER A LINK WHERE THE AD IS COVERING THE CAPTCHA OR BUTTON, YOU SHOULD TRY TO ZOOM OUT (TILL 25%) TO SHOW BUTTON OR CLOSE AD.
FOR DESKTOP YOU CAN HOLD CTRL BUTTON AND USE THE + OR - KEYS TO ZOOM.
FOR MOBILE USERS YOU CAN CHOOSE DESKTOP VIEW TO ZOOM, MAYBE USE A DOUBLE TAP ON SCREEN TO GET EXTRA ZOOM OPTION.
ALTERNATIVELY YOU CAN USE THE "TAB" KEY TO MOVE FROM LINK TO LINK TILL YOU SEE IT HIGHLIGHTING THE BUTTON AND JUST PRESS ENTER.